Auction of 3 Rarest DSP CPU/LSIs (large-scale integration) made in Russia (no foreign clones) : 
 
1815VF1 - Rarest Russian LSI weighted summation (24-pins, Integral factory, OP (Opytniy) - Pilot Batch, 1985)
1815VF3 - Rarest Russian LSI microprocessor for fast Fourier transform (24-pins, Integral factory, military (rhombus sign), 1990)  
1815IR1 - Rarest Russian LSI - scheme of shift registers FIFO (28-pins, Integral factory, military (rhombus sign), 1990) 
 

Great item for chip collectors !!!

ICs/CPUs from the Old Stock, in working order.